That AD currently requires either revising the airplane flight
manual (AFM) and installing a placard in the flight deck to
prohibit flight into known or forecasted icing conditions, or
repetitively inspecting for delamination of the flexible hoses in
the wing (slat) anti-icing system and performing corrective actions
if necessary.

That AD also provides optional terminating action for the
repetitive inspections. This new AD mandates the previously
optional terminating action. This AD results from a report of
in-service delamination ofa flexible hose in the slat anti-icing
system at a time earlier than previously reported.

We are issuing this AD to prevent collapse of the flexible hoses
in the slat anti-icing system, which could lead to insufficient
anti-icing capability and, if icing is encountered in this
situation, could result inreduced controllability of the
airplane.